Предмет: Химия, автор: Kisa04042014

В 230г воды растворено 25г соли.Определите массовую долю соли в растворе

Ответы

Автор ответа: тайная

дано:
m(воды) = 230 г
m(соли) = 25 г
найти: w(р-ра)
решение:
m(р-ра) = m(соли) + m(воды) = 230 г + 25 г = 255 г
w(р-ра) = m(соли) · 100%m(р-ра) = 25 г· 100%255 г = 9,8%
ответ: 9,8%

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